JP4249725B2 - Double bag wave control structure, manufacturing method and construction method thereof - Google Patents

Description

  The present invention relates to a double bag wave control structure, a manufacturing method thereof, and a construction method thereof. In particular, the service life can be increased, and it is safe for surfers, bathers, etc. The present invention relates to a double bag wave control structure capable of preserving the environment and creating an environment that is good for the ecosystem, a manufacturing method thereof, and a construction method thereof.

  As a conventional technique related to a wave control structure, for example, a wave-resistant civil engineering bag material provided with the following partition is known. In this prior art, after filling the mesh bag material made of synthetic fiber with an intermediate partition with a filling material such as crushed stone or gravel, the opening at the top of the mesh bag material is closed and tied with a rope. A bag body filled with the material is formed. And the movement of the filling material in the bag body by the action of waves is prevented, and the shear deformation of the bag body is reduced (for example, see Patent Document 1).

Further, as other conventional techniques related to the wave control structure, for example, the following covering materials, methods for producing the covering materials, scour prevention structures, and scour prevention methods are known. In this prior art, a plurality of bags are connected by stitching the left and right sides of the two nets made of synthetic fibers or natural fibers, the outer peripheral portion to be the bottom, and each portion of the suture line for forming a continuous tube shape. Prepare a net bag in the shape of a cylinder, and after filling the net bag with filling materials such as gravel, crushed stone, artificial gravel, and recycled stone, cover the mouth of the net bag and configure the covering material Yes. And by making it a continuous cylinder shape, the net | network tension which restrains a filling material is enlarged, and it has enabled it to reduce the abrasion of a net | network material (for example, refer patent document 2).
JP2003-129443A (2nd and 3rd pages, FIG. 1). JP2003-171923A (2nd and 3rd pages, FIG. 1).

  In the prior art described in Patent Document 1, a synthetic fiber net bag material is filled with a filling material such as crushed stone or gravel. For this reason, when the net bag material is damaged due to sharp objects such as floating materials when a typhoon strikes, and the filling material flows out, the function of protecting the harbors from the waves of the open sea deteriorates and the local natural environment is affected. There is a risk of injuries and injuries to bathers.

  Moreover, in the prior art described in Patent Document 2, a bag material in which a plurality of synthetic fiber net bags are combined in a continuous cylinder shape is filled with filling materials such as gravel, crushed stone, and recycled stone material. ing. For this reason, when the bag material is damaged by a sharp object such as a floating substance and the filling material flows out at the time of an typhoon or the like, there is a risk similar to the above.

  Further, it is desired that the construction on the beach or the like can be low in manufacturing cost, has a shape and weight adapted to the site, and can prevent local scouring.

  Therefore, the service life is increased, it is safe for surfers and bathers, etc., the local natural environment is preserved, the environment is good for the ecosystem, the cost is reduced, and the shape and weight are adapted to the installation site. There is a technical problem to be solved in order to make a double bag wave control structure and to prevent local scouring around the structure. The present invention aims to solve this problem.

  The present invention has been proposed in order to achieve the above object, and the invention according to claim 1 is characterized in that a plurality of cells are formed by partitioning opposed inner surfaces of two stacked sheets substantially parallel to each other at an appropriate interval. And forming a cell-attached sheet body by filling each of the plurality of cells with a flowable filling material having a specific gravity greater than that of water containing sand, and adding sand to the bag material formed by the cell-attached sheet body. Provided is a double bag wave control structure configured by filling a fluid filling medium having a specific gravity greater than that of the contained water.

  According to this structure, the wave control structure is covered with the cell-attached sheet body in which the central bag body filled with the filling material has a plurality of cells (small bags) filled with the filling material. It has a double bag structure. The double bag wave control structure is usually constructed as an appropriate bank by a plurality of the structures, and is installed on the beach, coast, underwater, etc., and protects the harbor from waves of the open sea. At the time of installation, the double bag wave control structure may be damaged or cracked by sharp objects such as floating objects due to high waves when a typhoon strikes. At this time, since the wave control structure has a double bag structure, damage and cracks due to sharp objects are received only by the cells (small bags) in the outer cell-attached sheet body, and the bag body on the center side It is possible to prevent damage and cracks.

  The invention according to claim 2 is that the material of the two sheets is a non-woven fabric or a woven fabric, and the outer sheet of the bag material is superior in performance to withstand breakage due to wave force and the inner side. This sheet provides a double bag wave control structure that is excellent in the ability to withstand the abrasion caused by the filling material.

  According to this configuration, the sheet forming the surface side of the cell has excellent performance to withstand damage due to wave force, and the sheet forming the central bag body has excellent performance to withstand abrasion due to the filling material. By doing so, it becomes possible to more reliably prevent the bag on the center side from being damaged and cracked due to high waves when a typhoon strikes. The double bag body wave control structure is made of nonwoven fabric or woven fabric, and the inside of the bag body is filled with a fluid filling material such as sand. It will be a safe structure. Furthermore, the sheet forming the surface side of the cell is easy to get algae, seaweed, etc., and creates an environment that is good for the ecosystem.

  According to a third aspect of the present invention, the inner sheet has a greater mechanical strength than the outer sheet, and the cross-sectional shape of each cell is substantially straight with respect to the inner sheet. The sheet provides a double bag wave control structure that bulges in an arc.

  According to this configuration, the cell-attached sheet body has a double bag structure because each cell bulges outward in a spherical shape with respect to the inner sheet having a large mechanical strength that becomes the bag body on the center side. Thus, it is possible to increase the strength of the bag on the center side.

  According to a fourth aspect of the present invention, there is provided a cell-attached sheet material having a plurality of cells formed by partitioning opposed inner surfaces of two overlapped sheets substantially in parallel at an appropriate interval. In the local production yard where the double bag wave control structure as a product is installed, and the fluid filling medium having a specific gravity greater than the water containing sand that can be procured locally in the production yard. A method for producing a double bag wave control structure in which a plurality of cells are filled to produce a cell-attached sheet body, and then the bag material formed by the cell-attached sheet body is filled with the same filling material as described above. provide.

  According to this configuration, the cost can be reduced by using local sand or the like as the filling material. Further, even if the cell is damaged and the filling material flows out, the filling material is local sand and the like, so it does not affect the local natural environment.

  Invention of Claim 5 is the shape corresponding to the field where the double bag wave control structure used as the above-mentioned product is installed, at least the shape and size of the cell in the sheet material with the cell to be carried into the manufacturing yard, Provided is a method of manufacturing a double bag wave control structure having dimensions.

  According to this configuration, it is possible to manufacture a double bag wave control structure having a shape and weight suitable for the installation site.

  According to a sixth aspect of the present invention, there is provided a plurality of the double bag wave control structures according to the first, second or third aspect, wherein the top is flat and the top is located below the water surface. A method for constructing a double bag wave control structure that spreads and piles up or is deposited on the outer surface of a rubble bank to construct an artificial reef or submerged bank is provided.

  According to this configuration, by constructing using a plurality of double bag wave control structures, it becomes an artificial reef or submerged dam that is easy for algae and seaweeds to arrive and is good for the ecosystem.

  The invention according to claim 7 is the double bag body wave control structure according to claim 1, 2 or 3, such that the top of the bank is located on the water surface on the outer surface of the rubble bank protruding from the shore to the sea side. Provided is a method for constructing a double bag wave control structure in which a plurality of units are attached to construct a jetty.

  According to this configuration, the construction using a plurality of double bag wave control structures provides a stable jetty for surfers, bathers and the like as well as having a stable depressurizing action against high waves.

  The invention according to claim 8 attaches a plurality of the double bag wave control structures according to claim 1, 2 or 3 to the outer surface of the rubble bank so that the top of the bank is located on the water surface. A construction method of a double bag wave control structure for constructing a breakwater is provided.

  According to this configuration, by using a plurality of double-bag body wave control structures, it has a stable de-energizing action against high waves and is safe for surfers and bathers. Become.

  The invention according to claim 9 is the artificial reef, the submerged dam, the jetty or the detachment of the plurality of the double bag wave control structures constructing the artificial reef, the submerged pier, the pier or the breakwater. Local scouring prevention means for preventing local scouring around the artificial reef, submerged levee, jetty or offshore levee from each double bag wave control structure located at the end of the pier A method for constructing a double bag wave control structure is provided.

  According to this configuration, local scouring means that are likely to occur around these structures due to waves by projecting local scouring prevention means on the bottom of the sea around the constructed artificial reef, submerged pier, jetty or offshore levee Is prevented.

  The invention according to claim 1 forms a plurality of cells by partitioning the opposed inner surfaces of the two overlapped sheets substantially in parallel at an appropriate interval, and each of the plurality of cells has a specific gravity greater than that of water containing sand. A sheet body with a cell is configured by filling a large fluid filling material, and a bag material formed by the cell body is filled with a fluid filling material having a specific gravity greater than that of water containing sand. Because it is configured by, the damage and cracks caused by sharp objects such as floating objects when a typhoon strikes are received only by a plurality of cells in the outer cell-attached sheet body, and the center side bag body is damaged and cracked. Can be prevented. Accordingly, there is an advantage that it is possible to prevent the loss of the filling material in the center-side bag body, hardly affect the function of protecting the harbor or the like from the waves of the open sea, and to increase the service life.

  The invention according to claim 2 is that the material of the two sheets is a non-woven fabric or a woven fabric, and the outer sheet of the bag material is superior in performance to withstand breakage due to wave force and the inner side. Since this sheet is excellent in the performance to withstand the abrasion caused by the filling material, it is possible to more reliably prevent the bag on the center side from being damaged or cracked by high waves when a typhoon or the like comes. The double bag body wave control structure is made of nonwoven fabric or woven fabric, and the inside of the bag body is filled with a fluid filling material such as sand. The sheet forming the surface side of the cell is advantageous in that it can easily be attached to algae, seaweed, and the like and can create an environment that is good for the ecosystem.

  According to a third aspect of the present invention, the inner sheet has a greater mechanical strength than the outer sheet, and the cross-sectional shape of each cell is substantially straight with respect to the inner sheet. Since the sheet bulges in an arc shape, there is an advantage that the strength of the bag on the center side can be increased.

  According to a fourth aspect of the present invention, there is provided a cell-attached sheet material having a plurality of cells formed by partitioning opposed inner surfaces of two overlapped sheets substantially in parallel at an appropriate interval. In the local production yard where the double bag wave control structure as a product is installed, and the fluid filling medium having a specific gravity greater than the water containing sand that can be procured locally in the production yard. Each of the cells was filled to prepare a sheet body with a cell, and then the bag material formed by the sheet body with the cell was filled with the same filling material as described above. For example, there is an advantage that even if the cell is damaged and the filling material flows out, the natural environment of the site is not affected.

  Invention of Claim 5 is the shape corresponding to the field where the double bag wave control structure used as the above-mentioned product is installed, at least the shape and size of the cell in the sheet material with the cell to be carried into the manufacturing yard, Because of the dimensions, there is an advantage that a double bag wave control structure having a shape and weight adapted to the installation site can be manufactured.

  According to a sixth aspect of the present invention, there is provided a plurality of the double bag wave control structures according to the first, second or third aspect, wherein the top is flat and the top is located below the water surface. The artificial reef or submerged dike is constructed by spreading and stacking or attaching to the outer surface of the rubble dike so that algae, seaweed, etc. are easy to arrive and the ecosystem is good. There is an advantage that you can.

  The invention according to claim 7 is the double bag body wave control structure according to claim 1, 2 or 3, such that the top of the bank is located on the water surface on the outer surface of the rubble bank protruding from the shore to the sea side. Since the jetty is constructed by attaching a plurality, there is an advantage that a safe jetty can be constructed for surfers and bathers.

  The invention according to claim 8 attaches a plurality of the double bag wave control structures according to claim 1, 2 or 3 to the outer surface of the rubble bank so that the top of the bank is located on the water surface. Since the offshore bank is constructed, there is an advantage that a stable banking bank can be constructed for a surfer, a bather and the like as well as having a stable depressurizing action against high waves.

  The invention according to claim 9 is the artificial reef, the submerged dam, the jetty or the detachment of the plurality of the double bag wave control structures constructing the artificial reef, the submerged pier, the pier or the breakwater. Local scouring prevention means for preventing local scouring around the artificial reef, submerged levee, jetty or offshore levee from each double bag wave control structure located at the end of the pier Therefore, there is an advantage that local scouring around the structure due to waves can be prevented.

  Extends the service life, is safe for surfers and bathers, protects the local natural environment, creates an environment that is good for the ecosystem, reduces costs and doubles the shape and weight adapted to the installation site For the purpose of forming a bag-like wave control structure and further preventing local scouring around the structure, the opposing inner surfaces of the two sheets of non-woven fabric or woven fabric that are overlapped are partitioned almost in parallel at appropriate intervals. A sheet material with a cell having a plurality of cells formed by the above method is manufactured, the sheet material with a cell is carried into a local production yard, and the fluidity filling is larger in specific gravity than water containing sand that can be procured locally. Each of the plurality of cells is filled with a material to produce a cell-attached sheet body, and the bag material formed by the cell-attached sheet body is filled with the same filling material as described above to form a double bag wave control structure. Constitution That. At least the shape and dimensions of the cells in the sheet material with cells to be carried into the manufacturing yard are the shapes and dimensions corresponding to the site. Among the plurality of double bag wave control structures that construct artificial leaves, etc., from each double bag wave control structure located at the end of the artificial leaf, This was realized by projecting local scouring prevention means to prevent local scouring.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1A is a plan view of a cell-attached sheet body, FIG. 1B is a cross-sectional view taken along line AA of FIG. 2A, and FIG. 2A is a plan view of the double bag wave control structure. (B) is BB sectional drawing of (a). First, the structure of the double bag wave control structure according to the present embodiment will be described with reference to FIGS. 1 and 2.

  In the double bag wave control structure, the central bag body filled with the filling material is covered with a sheet body with cells having a plurality of cells (small bags) filled with the filling material. It has a bag structure. In this specification, the bag material refers to a mere bag-like material that is not yet filled with the filling material, and the bag body refers to the bag material filled with the filling material.

  As shown in FIGS. 1 (a) and 1 (b), the cell-attached sheet body 1 is formed by partitioning the facing inner surfaces of the two overlapped sheets 2a and 2b approximately in parallel with the partition portion 3 with an appropriate interval. A plurality of cells 4 are formed, and each of the plurality of cells 4 is filled with a fluid filling medium 5a having a specific gravity greater than that of water containing sand.

  Each of the sheets 2a and 2b is made of a geotextile (civil engineering sheet) used in a port facility for preventing sucking out of a port facility or a sand and sand stabilization method. It is. The partition part 3 is fixed by applying a stitching or adhesion method. Further, both ends 6a, 6b of the cells 4,... Are closed by applying a stitching or adhesion method.

  Out of the two sheets 2a and 2b, the outer sheet 2a when the double bag structure is used is excellent in performance to withstand damage by wave force, and the inner sheet 2b is in contact with the filling material on both sides. Therefore, a material having excellent performance to withstand abrasion due to the filling material is used. Further, the inner sheet 2b is thicker and has a higher mechanical strength than the outer sheet 2a. As shown in FIG. 1B, the cross-sectional shape of each cell 4,. In contrast to the inner sheet 2b, the outer sheet 2a bulges in an arc shape. As described above, the outer sheet 2a and the inner sheet 2b are configured so as to be able to cope with the strength and durability required for the cell-attached sheet body 1 by changing the properties thereof.

  The dimensions of the cell-attached sheet body 1 are such that the height t of each cell 4,... Is about 150 to 300 mm, the width d is about 500 to 600 mm, and the width L of the sheet body 1 is about 6.0 m. The width L of the sheet 1 is substantially the same as the length of the double bag wave control structure described below. Moreover, the length of the horizontal direction of Fig.1 (a) is the length according to the magnitude | size of the double bag body wave control structure formed. As will be described later, each dimension of the cell-attached sheet body 1 is a dimension corresponding to the site where the double bag wave control structure is installed. It is not limited.

  As shown in FIGS. 2 (a) and 2 (b), the double bag wave control structure 7 has a cylindrical body in which the cell-attached sheet body 1 is wound in a cylindrical shape. The bag material is formed by closing with a rope or the like. The bag material is filled with a fluid filling medium 5b having a specific gravity greater than that of water containing sand to form a double bag structure. The filling of the filling material 5b into the bag material is carried out after the formation of the bag material, after the required amount of the filling material 5b is introduced into the bag material from the opening 7b at the center of the upper surface shown in FIG. The opening 7b is closed by sewing or closing with a chuck attached in advance.

  The bag material formed by the cell-attached sheet body 1 is substantially cylindrical as described above in the empty state, but as the filling material 5b is introduced, as shown in FIG. Becomes a kamaboko type. The kamaboko-shaped double bag wave control structure 7 has a height T of about 1.0 m, a width D of about 3.0 m, and a length L of about 6.0 m. As described above, each dimension of the cell-attached sheet body 1 is a dimension corresponding to the site, and therefore each dimension of the illustrated double bag body wave control structure 7 is not limited to this. .

  Next, an example of a method for manufacturing the double bag wave control structure 7 will be described. At the factory, the outer sheet 2b is superposed on the inner sheet 2b, and a cell-attached sheet material having a plurality of cells 4,. At this time, the shape and size of each of the cells 4 in the cell-attached sheet material are the shape and size corresponding to the site where the double bag wave control structure 7 is installed.

  Such a cell-attached sheet material is carried into a local production yard where the double bag wave control structure 7 as a product is installed. Then, the fluid-filled filling material 5a having a specific gravity greater than that of water containing sand that can be procured locally in the production yard is filled in each of the plurality of cells 4,. Next, as described above, the cell-attached sheet body 1 is wound into a cylindrical shape, and both end portions 7a and 7a are closed to form a bag material, and the bag material can be procured locally as described above. A double bag wave control structure 7 is manufactured by filling the filling material 5b.

  3 and 4 show a construction example of an artificial reef or submerged dam 9 constructed on site using a plurality of double bag wave control structures 7 manufactured as described above. The artificial reef or submerged dike 9 has a plurality of double bag wave control structures 7 spread on the seabed ground 10 so that the top is substantially flat and the top is located below the water surface, and It is built up in two stages.

  Of the plurality of double bag body wave control structures 7 constructing the artificial reef or submerged dam 9, each double bag body located at the lower end side at the end of the artificial reef or submerged dam 9 From the wave control structure 7D,..., A local scouring prevention portion (local scouring prevention means) 8,.

  In the illustrated example, two adjacent local scouring prevention parts 8 and 8 are attached to the lower double-sided bag wave control structure 7D via a connection part 8a. Although the structure of the local scouring prevention part 8 is not particularly limited, it is formed by filling the filling material 5a as a double bag structure composed of two sheets 2a and 2b, like the cell 4 shown in FIG. Is preferred. Moreover, each overhang | projection length of the local scouring prevention mechanism including the local scouring prevention part 8 and the connection part 8a is about 2.5 m. The connecting portion 8a may be a sheet, a string, a wire, or the like. In addition, the local scouring prevention unit 8 is attached in advance to the required portion of the outer sheet 2a of the corresponding cell-attached sheet material on the lower side by stitching or bonding or the like via the connection portion 8a when the cell-attached sheet material is manufactured. You may keep it.

  In addition, in each double bag body wave control structure 7D located on the lower side of the upper and lower parts in FIG. 4, the connecting portion 8a and the local scouring preventing portions 8, 8 are provided at the outer ends in the longitudinal direction. Each double bag wave control structure 7D, which is attached and located on the lower side of the right part of the figure, has a connecting portion 8a and a local scouring prevention portion 8, 8 is attached.

  Next, the operation of the double bag wave control structure configured as described above will be described. The double bag body wave control structures 7, 7D (hereinafter simply referred to as “double bag body wave control structure 7” together) are constructed as artificial reefs or submerged dikes 9 by the plural, and are constructed on the beach, coast. It is installed in the sea and protects harbors from waves in the open sea. At the time of installation, the double bag wave control structure 7 constituting the surface side of the artificial reef or the submerged dike 9 is damaged by sharp objects such as floating objects due to high waves when a typhoon hits. There is a risk of cracks and the like.

  At this time, since the double bag wave control structure 7 has a double bag structure, breakage and cracks caused by sharp objects can be caused only by the cells 4 in the outer cell-attached sheet body 1. This prevents the center side bag from being damaged or cracked. Further, the surface side, that is, the outer sheet 2a of each cell 4,... Is excellent in performance to withstand breakage due to wave force, and the sheet forming the central bag body, that is, the inner sheet 2b, is the filling material 5a. , 5b is used, it is more reliably prevented from being damaged or cracked in the bag on the center side.

  In the double bag body wave control structure 7, the material of each sheet 2a, 2b is a non-woven fabric or a woven fabric made of synthetic resin such as polyester or polypropylene, and the inside of the bag body has fluidity such as sand. By being filled with the fillers 5a and 5b, it becomes a safe structure for surfers, bathers, and the like. Furthermore, an environment that is easy for algae, seaweeds, and the like to adhere to the ecosystem is created on the outer sheet 2a.

  The double bag wave control structure 7 can reduce the cost by using local sand or the like as the filling materials 5a and 5b. Further, even if the cells 4,... Are damaged and the filling material 5a flows out, since the filling material 5a is local sand or the like, it does not affect the local natural environment.

  The double bag body wave control structure 7 is manufactured in a shape and weight suitable for the site, so that it is easy to construct an artificial reef or submerged dike 9 and the like in a shape and weight suitable for the site. It becomes. Further, the local scouring prevention portions 8 and 8 are projected from the artificial reef or submerged dike 9 on the sea bottom in the vicinity thereof, so that the local scouring which is likely to occur around the artificial reef or submerged dike 9 due to the waves. Is prevented.

  As described above, in the double bag wave control structure according to the present embodiment, it is possible to protect the bag body on the center side from damage and cracks caused by sharp objects such as floating objects when a typhoon strikes. The service life can be increased.

  The double bag wave control structure 7 is safe for surfers, bathers, and the like. Furthermore, the outer sheet 2a can be easily attached to algae, seaweeds, etc., and can create an environment that is good for the ecosystem.

  Cost can be reduced by using local sand or the like as the filling materials 5a and 5b, and the local natural environment can be preserved.

  By projecting the local scouring prevention portions 8 and 8 from the artificial reef or submerged dam 9, local scouring around the artificial reef or submerged dam 9 due to waves can be prevented.

  Next, another construction example constructed on site using a plurality of the double bag wave control structures 7 will be described with reference to FIGS. Although not shown in the structures shown in FIGS. 5 to 7, the double bag wave control structure located at the lower end side of each structure is shown in FIGS. 3 and 4. Each of the local scouring prevention parts similar to those shown in FIG.

  FIG. 5 shows another example in which a plurality of double bag wave control structures 7,... Are attached to the outer surface of the rubble 11 so that the top is substantially flat and the top is located below the water surface. An artificial reef or submerged dike 12 is constructed. In this construction example, other artificial reefs or submersibles 12 that are easy to get algae, seaweeds, etc. and are good for the ecosystem are obtained.

  FIG. 6 shows that a plurality of double bag wave control structures are attached to the outer surface of a rubble bank (not shown) protruding from the shore 13 to the sea side so that the top of the bank is located on the water surface. The jetty 14 is constructed. In this construction example, the jetty 14 has a stable depressurizing action against high waves from the open sea and is safe for surfers and bathers.

  FIG. 7 shows an offshore bank 15 constructed by depositing a plurality of double bag wave control structures on the outer surface of a rubble bank (not shown) so that the top of the bank is located on the water surface. It is. In this construction example, similarly to the above, the berthing bank 15 has a stable depressurizing action against high waves from the open sea and is safe for surfers and bathers.

  Each of the above construction examples constructed by using a plurality of double bag wave control structures 7 has the function of protecting harbors and the like by reducing waves from the open sea. By the way, the double bag wave control structure 7 configured by using sheets 2a and 2b made of a synthetic resin non-woven fabric or woven fabric functions safely for surfers, bathers and the like. Therefore, it is also possible to construct a structure that generates a wave having a large wave height, particularly in line with the desire of a surfer or the like.

  That is, for example, when a structure such as two submerged dike constructed using a plurality of double bag wave control structures 7 is installed so as to open in a C shape from the shore side to the offshore side, From the narrow-width portion of the C-shaped structure, it is possible to obtain a wave having a partially high wave height, as desired by the surfer or the like.

  In addition, each of the above construction examples is installed on the beach, coast, underwater, etc., but the double bag wave control structure 7 is, for example, a river revetment structure, a sediment stabilization structure, and a slope. The present invention can also be applied to a structure that is installed at a place other than the beach or the like, such as a stable construction method.

  The present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

The figure shows a double bag wave control structure according to an embodiment of the present invention, a manufacturing method thereof, and a construction method thereof.
Sectional drawing and a top view of a sheet body with a cell. Sectional drawing and a top view of a double bag body wave control structure. The side view of the artificial reef or submerged dike which is the construction example constructed using the double bag wave control structure. FIG. 4 is a plan view of FIG. 3. Sectional drawing of the other artificial reef or submerged dike which is the construction example constructed using the double bag body wave control structure. The top view of the jetty which is the construction example constructed using the double bag body wave control structure. The side view of the offshore levee which is the construction example constructed using the double bag body wave control structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sheet body with a cell 2a, 2b Sheet 3 Partition part 4 Cell 5a, 5b Filling material 7 Double bag wave control structure 8 Local scouring prevention part (local scouring prevention means)
9 Artificial reef or submerged 10 Submarine ground 11 Rubble bank 12 Other artificial reef or submerged 13 Wharf 14 Jetty 15 Offshore breakwater

Claims (9)

  A plurality of cells are formed by partitioning the opposed inner surfaces of the two stacked sheets substantially in parallel at an appropriate interval, and each of the plurality of cells has a fluidity filling material having a specific gravity greater than that of water containing sand. Is formed by filling a bag material formed of the cell-attached sheet body with a fluid filling medium having a specific gravity greater than that of water containing sand. Double bag wave control structure.   The material of the two sheets is a non-woven fabric or a woven fabric. Of the two sheets, the outer sheet of the bag material is excellent in resistance to damage by wave force, and the inner sheet is the filling material. The double bag wave control structure according to claim 1, wherein the structure has excellent performance to withstand abrasion due to water.   The inner sheet has a higher mechanical strength than the outer sheet, and the cross-sectional shape of each cell is substantially linear, whereas the outer sheet bulges out in an arc. The double bag wave control structure according to claim 1 or 2, wherein the double bag wave control structure is provided.   A sheet material with a cell having a plurality of cells formed by partitioning opposed inner surfaces of two overlapped sheets substantially in parallel at an appropriate interval, and the sheet material with the cell is used as a product. Each of the plurality of cells is filled with a fluid filling medium having a specific gravity greater than that of water containing sand that can be procured locally at the production yard. A method for producing a double bag wave control structure, comprising: producing a sheet body with cells, and then filling a bag material formed from the sheet body with cells with the same filling material as described above.   The shape and size of at least the cell in the cell-attached sheet material carried into the manufacturing yard is a shape and size corresponding to the site where the double bag wave control structure to be the product is installed. The manufacturing method of the double bag wave control structure of Claim 4.   A plurality of the double bag wave control structures according to claim 1, 2 or 3, wherein the top is flat and the top is located below the surface of the water. A method for constructing a double bag wave control structure, characterized in that an artificial reef or submerged dike is constructed by attaching to the outer surface of a rubble bank.   A plurality of the double bag wave control structures according to claim 1, 2 or 3 are attached to the outer surface of a rubble bank protruding from the shore to the sea side so that the top of the bank is located on the water surface. The construction method of the double bag body wave control structure characterized by constructing.   A plurality of the double bag wave control structures according to claim 1, 2 or 3 are attached to the outer surface of the rubble bank so that the top of the bank is located on the water surface. A construction method of a characteristic double bag wave control structure. Among the plurality of double bag wave control structures constructing the artificial reef, submerged pier, jetty or breakwater, located at the end of the artificial reef, submerged pier, jetty or breakwater A local scouring prevention means for preventing local scouring around the artificial reef, submerged levee, jetty or offshore levee is projected from each double bag wave control structure. The construction method of the double bag body wave control structure of 7 or 8.

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